FN Archimer Export Format
PT J
TI Effects of calcification patterns on the oxygen isotope composition of the skeleton of the scleractinian coral Acropora formosa
BT 
AF JUILLETLECLERC, A
   MONTAGGIONI, LF
   PICHON, M
   GATTUSO, JP
AS 1:;2:;3:;4:;
FF 1:;2:;3:;4:;
C1 UNIV AIX MARSEILLE 1,CTR SEDIMENTOL PALEONTOL,UPRESA CNRS 6019,F-13331 MARSEILLE 3,FRANCE
   AUSTRALIAN INST MARINE SCI,TOWNSVILLE,QLD 4810,AUSTRALIA
   UNIV PERPIGNAN,ECOLE PRAT HAUTES ETUD,MARINE BIOL LAB,URA CNRS 1453,F-66860 PERPIGNAN,FRANCE
   OBSERV OCEANOL EUROPEEN,CTR SCI MONACO,MC-98000 MONACO,MONACO
C2 UNIV AIX MARSEILLE 1,CTR SEDIMENTOL PALEONTOL,UPRESA CNRS 6019,F-13331 MARSEILLE 3,FRANCE
   AUSTRALIAN INST MARINE SCI,TOWNSVILLE,QLD 4810,AUSTRALIA
   UNIV PERPIGNAN,ECOLE PRAT HAUTES ETUD,MARINE BIOL LAB,URA CNRS 1453,F-66860 PERPIGNAN,FRANCE
   OBSERV OCEANOL EUROPEEN,CTR SCI MONACO,MC-98000 MONACO,MONACO
IF 0.662
TC 6
UR https://archimer.ifremer.fr/doc/00093/20423/18090.pdf
LA English
DT Article
AB Oxygen isotope ratios were measured along the growth axis of branches of the scleractinian coral Acropora formosa collected at 2 and 12 metre depths at Yonge reef (Northern Great Barrier Reef, Australia). Measurements were made between two reference points separated by a distance corresponding to a growth period of six months, from mid-winter to mid-summer. For each of the two reference points, information concerning the environmental parameters controlling the development of the coral colonies was collected in situ. The variability of the isotopic values recorded from coral skeletons grown in identical physical and chemical conditions cannot be ascribed to technical problems, but may rather be induced by calcification mechanisms. In order to define the influence of calcification processes on oxygen isotopic composition, a simple mathematical model is developed, simulating the behaviour of oxygen isotopes. According to Gladfelter's studies (1982, 1983, 1984), we infer that the main factors affecting the isotopic ratio of skeletal aragonite in the scleractinian coral Acropora genus are on the one hand the initial quantity of aragonite deposited at the apical part of the branch and consequently the relative amount of primary and secondary aragonite infilling residual pores during coral growth, and on the other hand, the duration of the secondary aragonite infilling. Comparisons between the measured and the calculated isotopic profiles reveal that differences in calcification processes account for isotopic discrepancies encountered in the different colonies analysed. This study stresses that care must be taken when using the oxygen isotope composition of coral skeleton as a paleoenvironmental proxy.
PY 1997
SO Oceanolica Acta
SN 0399-1784
PU Gauthier-Villars
VL 20
IS 4
UT A1997XU31400007
BP 645
EP 658
ID 20423
ER

EF